Nu-(heterocyclic substituted alkylidene) amino-alkylsilicon compounds and process for producing the same



United States Patent N-(HETEROCYCLIC SUBSTITUTED ALKYLIDENE) AMINO ALKYLSILICGN COMPOUNDS AND PROCESS FOR PRODUCING THE SAME Robert J. Lisanke, Buffalo, 'N.Y., assignor to Union Carbide Corporation, a corporation of New York No Drawing. Filed June 27, 1958, Ser. No. 744,901 17 Claims. (Cl. MSG-4&5)

This invention relates to new and useful organosilicon compounds. "More particularly, the invention relates to organosilicon compounds containing a N-(heterocyclic substituted alkylidene) aminoalkylsilyl grouping wherein the amino group is interconnected to the silicon atom of the silyl grouping through at least three carbon atoms, as new compositions of matter and to a process for producing them.

The compositions of the instant invention are organosilicon compounds which contain at least one silicon atom and N-(heterocyclic substituted alkylidene) aminoalkylsilyl grouping as represented by the formula:

wherein R is a hydrocarbyl group or a hydrogen atom, a is an integer having a value of at least 3 and preferably from 3 to 9 inclusive, b is an integer having a value of from .0 to 3 inclusive, and R is a monovalent heterocyclic group containing no heterocyclic ring of less than atoms and composed of carbon, hydrogen and from 1 to 2 heteroeyclic atoms, said heteroeyclic group containing no other heteroeyclic atoms than nitrogen and oxygen, each silicon atom of the organosilicon compound is bonded to from 1 to 3 oxygen atoms, each silicon bonded oxyen atom beingbonded to either a silicon atom or a carbon atom of an alkyl group and each remaining unfilled valence of all silicon atoms is satisfied by no other group than a hydrogen atom or a hydrocarbyl group. Such heteroeyclic groups include those containing one nitrogen atom in the ring, e.g. pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl and the like; those containing one oxygen atom in the ring, e.g. furyl, benzofuryl, pyranyl, xanthyl and the like; those containing two nitrogen atoms in the ring, e.g. indazyl, pyrimidyl, pyrazyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl and the like; those containing two oxygen atoms in the ring, e.g. para-dioxin and the like; and those containing one oxygen atom and one nitrogen atom in the ring, e.g. 1,4- oxazinyl, benzoxazinyl, benzisoazolyl, oxazolyl, isooxazolyl and the like. Such heteroeyclic groups also include those that contain a single heterocyclic ring such as furyl, pyrryl, pyridyl and the like as well as those containing fused rings such as, for example, 1,2-benzopyranyl, indazyl, indolyl, naphthyridinyl, pyrido(3-2-b)- pyridinyl, carbazyl, acridinyl, quinolinyl and the like. By the term hydrocarbyl group, as used herein, is meant a monovalent hydrocarbon radical.

Compositions of this invention which are monomeric are the organosilanes represented by the formula:

wherein R, R a and b have the above-defined meanings and R represents a hydrocarbyl group or a hydrogen atom, R represents an alkoxy group and n is an integer of from 0 to 2. The organosilanes which are monofunc- .tional in regard to the silicon atom (i.e. where 'n=2) silicon atom (i.e. where n=1) are, for example, delta- N (pyridylmethylidene)aminobutylmethyldiethoxysilane, gamma N (acridinylmethylidene) aminopropylphenyldimethoxysilane and the like. Organosilanes which are trifunctional in regard to the silicon atom (i.e. where 11:0) are, for example, delta-N-(pyridinylmethylidene) aminobutyltriethoxysilane, delta N [quinolinyl- (methyl) methylidene] aminobutyitributoxysilane, gamma-N-(piperidinylmethylidene)trimethoxysilane and the like.

The compositions of this invention which are polymeric are the organosiloxanes as represented by the formula:

wherein R, R R a, b and n have the above-defined meanings. The organosiloxanes of this invention that are triiunctional in regard to the silicon atom (i.e. where 11:0) include crosslinked organopolysiloxanes, for example, delta N (furylmethylidene)aminobutylpolysiloxane, gamma N (indolylmethylidene) aminopropylpolysiloxane and the like. Organosiloxanes of this invention which are difunctional in regard to the silicon atom (i.e. where 12:1) include the linear organosiloxanes, for example, gamma N (pyrrylmethylidene)aminopropylrnethylpolysiloxane, delta N (benzoturylmethylidene)- aminobutylphenylpolysiloxane and the like. The organesiloxanes which are difunctional in regard to the silicon atom (i.e. where n=1) also include cyclic organosiloxanes of the formula:

R1 R b 2b)=N(C,HzfiF-Oj wherein R, R R a and b have the above-defined meanings and d is an integer of from 3 to 7. These cyclic organosiloxanes are, for example, tetra gamma-N- (acridinylmet'nylidene)aminopropyltetraethylcyclotetrasiloxane, penta-delta N (indolylmethylidene)aminobutylpenta-phenylcyclopentasiloxane, hepta-gamma-N-(quinolinylmethylidene)aminopropylhepta ethylcycloheptasiloxane and the like. The organosiloxanes of this invention which are monofunctional in regard to the silicon atom (i.e. Where 11:2) are the dimeric organosiloxanes, for example, bis-gamma-N- (indazylmethylidene) aminopropyldimethyldisiloxane, bis-delta N (pyridylmethylidene)- aminobutyldiphenyldisiloxane and the like.

Compositions of this invention which are copolymeric are those copolymeric organosiloxanes containing the units represented by the formulae:

wherein R, R R a, b and n have the above-defined meanings and c is an integer having a value of from 0 to 3, 0 need not have the same value throughout the same molecule, n need not have the same value throughout the same molecule and R can represent the'same or different groups within the same molecule. Thus, the copolymeric organosiloxanes of this invention include endblocked linear copolymeric organosiloxane oils, copolymeric cyclic organosiloxanes and copolymeric resinous organosiloxanes containingthe same or difierent substitutedmono-, diand tri-functional silicon atoms or the organosiloxanes of this invention can exist as copolymeric difunctional organosiloxane gums. Such copolymeric organosiloxane oils are those having the formula:

R R2 R S[Rg sio],[R(ObH1b) =N(G,E.)Sli-0l sing wherein R, R R a and b have the above-defined meanings, y is an integer and x is an integer of at least 1, and R represents the same or difierent groups in the same molecule within its meaning as defined above. Such copolymeric organosiloxane oils are, for example, trimethylsiloxy end-blocked dimethylsiloxane gamma N (acridinylmethylidene)aminopropylphenylsiloxane oil, triphenylsiloxy end-blocked diphenylsiloxane-delta-N-(furfurylidene)aminobutylmethylsiloxane, tributylsiloxy endblocked phenylmethylsiloxane-omega-N-(indazylmethylidene)aminoundecylmethylsiloxane oil and the like. Such copolymeric cyclic organosiloxanes are, for example, gamma N (furylethylidene) aminopropylheptamethylcyclotetrasiloxane, delta-N-(indolylmethylidene)- aminobutylpentaphenylcyclotrisiloxane, gamma-N-(pyrryl(ethyl)methylidene)aminopropyl nona-methylcyclopentasiloxane and the like. Such copolymeric resinous organosiloxanes are, for example: a

and the like.

In accordance with my invention, the new compounds thereof are prepared by reacting an aldehyde or ketone containing a heterocyclic group with an organosilicon compound containing an aminoalkylsilyl grouping wherein the amino group is interconnected to the silicon atom by at least 3 carbon atoms. The overall reaction is depicted by the following equation:

R1 (Cb 2b)- =O 7 n 2n)SiE R1 R( b 2b) nHn) EHaO (1) where R, R a and b have the above-defined values.

The organosilicon compounds containing an aminoalkylsilyl grouping that are useful as starting materials in the preparation of the compositions of this invention are those which contain units of the formula:

l Ens- 0,111.) s1--R wherein R R n and a have the above-defined meanings. Examples of such aminoalkylsilanes are gamma-aminopropyltrimethoxysilane, gamma aminopropylrnethyldiethoxysilane, gamma aminopropyldiphenylmethoxysilane, omega-aminoundecenyltriethoxysilane and the like.

The polymeric organosilicon compounds containing an aminoalkylsilyl grouping that are useful in preparing the compositions of this invention are the aminoalkylsiloxanes depicted by the formula:

where R :1 and n have the above-defined meaning. These materials can be cyclic aminoalkylsiloxanes as well as linear aminoalkylsiloxanes as, for example, where n is 1, the compounds can be in the cyclic form having from 3 to 7 such units or they can be linear having a number of such groupings. These polymeric materials can be prepared by the hydrolysis and condensation of the corresponding alkoxysilanes. Illustrative of the cyclic aminoalkylsiloxanes suitable for use as starting materials are, for example, tetra-gamma-amino-propyltetramethylcyclotetrasiloxane, tetradelta-aminobutyl tetraphenylcyclotetrasiloxane and the like. Illustrative of the linear aminoalkylpolysiloxanes are gamma-aminopropylphenylpolysiloxane, delta-aminobutylmethylpolysiloxane, deltaaminobutylethylpolysiloxane and the like. Where n is 0 in the above formula, the materials are of the trifunctional variety, such as, for example, gamma-aminopropylpolysiloxane, delta-aminobutylpolysiloxane and the like. These aminoalkylsiloxanes can have residual alkoxyl groups in the siloxane chains. Such aminoalkylsiloxane containing residual alkoxy groups can be prepared by the partial hydrolysis and condensation of the corresponding aminoalkylalkoxysilanes.

The copolymeric' organosilicon compounds containing an aminoalkylsilyl grouping that are useful in preparing 2 and where R a, c and n have the abovedescribed values. The copolymeric materials suitable for the preparation of the compositions of this invention can contain various combined siloxane units such as trifunctional aminoalkylsiloxane units (where n=0) with difunctional alkyl-, aryl, or mixed alkyland arylsiloxane units (where 0:2). These copolymers can also contain various combined siloxane units; difunctional aminoalkylsiloxane units (where n=l) with trifunctional alkyl-, arylor mixed alkyl and arylsiloxane units (where n=l) or with difunctional alkyl-, arylor mixed alkyland arylsiloxane units (wherec=2) or with any combination of these units so long as it contains at least one aminoalkylsiloxane unit of any type, that is, mono-, di-, or trifunctional. These copolymeric materials can be prepared by the cohydrolysis and co-condensation of the corresponding alkoxysilane compounds. Such copolyrners can contain silicon-bonded alkoxy groups, or they can comprise essentially completely condensed materials.

The aminoalkylalkoxysilanes and aminoalkylpolysiloxanes as well as copolymers containing aminoalkylsiloxane and hydrocarbylsiloxane units can be prepared by disclosed methods known to those in the art.

The aldehydes or ketones containing a heterocyclic group that are useful in producing the compositions of this invention are those of the formula:

wherein R and R have the above-defined meanings. .Thes-ealdehydes and ketone starting materials are known and can be prepared by known methods.

The compositions of ,my invention are produced by forming a mixture of an organosilicon compound containing an aminoalkylsilyl group with an aldehyde or ketone containing a heterocyclic group as depicted above and maintaining the mixture at a temperature at which the orgauosilicon compound containing an aminoalkyl- .silyl grouping and the aldehyde or ketone react. There results, or is produced, water and an organosilicon compound containing an N-(heterocyclic substituted alkylidene)aminoalkylsilyl grouping wherein said amino group is interconnected to a silicon atom through at least three carbon atoms. The alkylidene group attached to the nitrogen group, when an aldehyde is used, is an alkyl group which contains, as a substituent, a heterocyclic group. When a ketone as depicted above is used, the alkylidene group contains, as a substituent, the heterocyclic grouping depictedabove and a hydrocarbyl group.

The relative amounts of the organosilicon compounds containing an aminoalkylsilyl grouping and the aldehyde or ketone starting materials is not narrowly critical and can be varied over a wide range. A ratio of amino nitrogen of the organosilicon compound containing the aminoalkylsilyl grouping to carbonyl group of the aldehyde or ketone of at least 1 to 1 is advantageous and it is preferred to use a ratio of at least 1 to 2. No commensurate advantage is gained by using relative amounts other than those described above.

The temperature at which the reaction takes place also ,is not narrowly critical and can vary from as low as C. to as high as 250 C. It is preferred, however, to carry out the reaction at a temperature of from about C. to 150 C.

The reaction is preferably carried out in a suitable solvent in which both the organosilicon compound containing the aminoalkylsilyl grouping and the aldehyde or ketone are soluble, said solvent being non-reactive therewith. Where the organosilicon compound containing the amino-alkylsilyl grouping also contains alkoxy groups, solvents that are miscible with water are preferred, for example, cyclic ethers such as tetrahydrofuran and dioxane and compounds that are represented by the formula R O(CH CH O) H and wherein R is an alkyl group that contains from 1 to 6 carbon atoms and w is an integer of from 1 to 2, since said water miscible solvents minimize the hydrolysis of said alkoxy groups by the water formed in the reaction. When the organesilicon compound containing an aminoalkylsilyl grouping is a polysiloxane, solvents which are not miscible with water are preferred, such as benzene, toluene, xylene and the like, although the cyclic ethers and other non-reactive solvents described above can be employed, the particular solvent being solely within the selection of one skilled in the art. Solvents that are not miscible with water are particularly useful where siloxanes are used, since the water of reaction can then be easily separated as an azeotrope with these solvents. However, any suitable solvent can be used.

The amount of the solvent within which the reaction .is carried out, is not narrowly critical and can be easily determinedby one skilled in the art. Amounts of such solvents of from 10 parts to about 400 parts by weight of the organosilicon compound containing the aminoalkylsilyl and the aldehyde or ketone starting materials can be employed. It is preferred to use such solvents in amounts of from 20 parts to 100 parts by weight of the-starting materials. Amounts of such solvents other than those described can be used, but no commensurate advantage is gained thereby.

As has been described above, a byproduct of the reaction, as shown in Equation 1, is water. Thiswater is preferably removed from the reaction mixture, as by azeotropic distillation by adding thereto a'solvent of the above-described type that not only is a solvent for the starting materials, butalsoforms an azeotrope with water. The water can be separated from the solvent and the solvent returned to the reaction mixture. The water can .also be removed by heating the reaction mixture to a temperature sufficiently elevated to vaporize the water or by adding a hydrophilic absorbent or adsorbent to the reaction mixture.

The compounds of this invention are particularly useful as sunscreen agents as well as ultraviolet absorbing agents. The compounds of this invention are also useful as starting materials in the production of substituted aminoalkylsilicon compounds as described and claimed in US. application Serial No. 744,936 concurrently filed herewith.

The following examples illustrate my invention:

Example 1 Into a l-liter, three-necked flask equipped with addition funnel, magnetic stirrer, and thermometer were placed Gamma-aminopropyltriethoxysilane (221.0 g., 1.0 mole), and tetrahydrofuran (250 ml.). The contents of the flask was chilled to about 5 C. by means of an ice bath and furaldehyde (96 g., 1.0 mole) added dropwise through the addition funnel with good stirring. The addition was completed over a 2 hr. period and was so regulated that the temperature of the reaction mixture did not rise above 40 C. The contents were stirred an additional 2 hrs. Tetrahydrofuran and other volatiles were then removed through a 10-in. insulated Vigreaux column to a maxi- .mum pot temperature of 225 C. over about a4 hr. period. The residue was chilled to room temperature and distilled in vacuo through a 10-in. insulated Vigreaux column. Gamma-N-(Z-furylmethylidene)aminopropyltriethoxysilane (HP. 184-189 (20 mm. Hg.)n =1.4738) was recovered and gave the following analysis:

Calculated for C H O SiN: C, 56.2; H, 8.3; Si, 9.4. Found: C, 55.4; H, 7.9; Si, 9.4.

The structure was verified by infrared analysis.

Example II Gamma-aminopropyltriethoxysilane (221 g., 1.0 mole) was reacted with Z-formyl pyridine (107 g., 1.0 mole) using methyl Carbitol (diethylene glycol monomethyl ether) (250 ml.) as the solvent and employing the same procedure described in Example I. After addition, the reaction mixture was stirred an additional 2 hrs. and methyl Carbitol and other volatiles removed through a 10-in. insulated Vigreaux column to a maximum pot temperature at 225 C. over a 4-hr. period. Gamma-N-(pyridylmethylidene aminopropyltriethoxysilane was recovered.

Example Ill Gamma-aminopropylmethyldiethoxysilane (191 g., 1.0 mole), was reacted with 3-acetyl indazyl (182 g., 1.0 mole) using diethylene glycol monobutyl ether (250 ml.) as the solvent and employing the procedure described in Example I. Gamma-N-(S-indazyl(methyl)methylidene)- aminopropylmethyldiethoxysilane was recovered.

7 Example IV Delta-aminobutylmethyl cyclotetrasiloxane (52 g., 0.1 mole) was reacted with 3-formyl-7-methyl indole (16 g., 0.1 mole) using diethylene glycol monobutyl ether (250 ml.) as the solvent and employing the procedure described in Example I.

Tetradelta-N- 7-methyl-3-indolylmethylidene) aminobutyl]tetramethylcyclotetrasiloxane was recovered.

Example V Eighty-two and a half grams of a dimethylsilicone oil containing wt.-percent of combined delta-aminobutylmethylsiloxy units and which had the average formula:

CH; CH;

(CHzhSiOKCHQaSiOl-r O)$=N (G4Hg) Sl-O SKCHQ);

was obtained.

Example V1 Eighty-two and a half grams of a dimethylsilicone oil containing 10 wt.-percent of combined delta-aminobutylmethylsiloxy units and having the average formula:

was reacted with 9-formy1acridine (20.7 g., 0.1 mole) using diethylene glycol monomethyl ether (250 ml.) as the solvent and employing the procedure described in Ex ample I. The mixture was homogeneous throughout the addition and became amber colored upon heating. A dimethylsilicone oil containing approximately 10 wt.-percent of combined delta-N-(9-acridinylmethylidene) aminobutylmethylsiloxy units and having the average formula:

was obtained.

Example VII Omega-arninoundecyltriethoxysilane can be reacted with 3-formylpyrazole according to the procedure described in Example I to yield omega-N-[3-pyrazolylmethylidene] aminoundecyltriethoxysilane. V

Example VIII Gamma-aminopropyldimethylethoxysilane can be reacted with 3-formylpyran according to the procedures described in-the previous examples to yield gamma-N-(3- pyranylmethylidene) aminopropyldimethylethoxysilane.

8 Example IX Delta-aminobutylphenyldibutoxysilane can be reacted with 5-formyloxazo1e according to the procedures described in the previous examples to yield delta-N-(S- oxazolylmethylidene) aminobutylphenyldibutoxysilane.

Example X Garnma-aminopropylmethyldiethoxysilane can be reacted with 3-acetylpyrazole according to the procedures described in the previous examples to yield gamma-N-[S- pyrazolyl (methyl) methylidene] aminopropylmethyldi ethoxysilane.

Example XI Gamma-arninopropylpentamethylcyclotrisiloxane can be reacted with 3-formylbenzisoxazole according to the procedure described in the previous examples to yield gamma N (3-benzisoxazolylmethylidene) aminopropylpentarnethylcyclotrisiloxane.

Example XII Delta-aminobutylnonamethylcyclopentasiloxane can be reacted with Z-acetyl-paradioxin according to the procedures described in the previous examples to yield delta- N [2 paradioxinyl(methyl)methylidene]arninobutylnonamethyicyclopentasiloxane.

Example XIII wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl, xanthyl,indazy1, pyrimidyl, pyrazyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, iso-oxazolyl, 1,2-benzopyranyl, naphthyridinyl, pyrido(3-2-b)-pyridinyl, carbazyl, pyridinyl and pyrazolyl groups, R is a member of the group consisting of the hydrogen atom and a monovalent hydrocarbon radicals, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is an alkoxy group, a is an integer of from 3 to 19 inclusive, b is an integer of from 0 to 3 inclusive, said heterocyclic group being interconnected to the group by a carbon to carbon bond when b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the (c H ygroup through a carbon to carbond bond, and n is an integer of from 0 to 2.

2. An organosiloxane consisting essentially of units of the formula:

wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, pipen'dinyl, quinolinyl, furyl, benzofuryl, pyranyl, xanthyl, indazyl, pyrimidyl, pyrazyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, isooxazolyl, 1,2-benzopyranyl, naphthyridinyl, pyrido- (Iioxazolyl,

2-b)-pyridinyl, carbazyl, pyridinyl and "pyrazoly1 groups, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, a is an integer of from 3 to 19 inclusive, b is an integer of from to 3 inclusive,

said heterocyclic group .being interconnected to the group by a carbon to carbon bond when 'b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the (-C H groupthrou'gh a carbon to carbon bond, and n is an integer of from 0 to 2.

3. A cyclic organosiloxane of the formula:

R R bH2b) ='N(C.,H2a)S i-O 1;

wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl, xanthyl, indazyl, pyrimidyl, pyrazyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, isooxazolyl, 1,2-benzopyranyl, naphthyridinyl, vpyrido-(3- 2-b)-pyridinyl, carbazyl, pyridinyl and .Pyrazolyl groups, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, a is an integer of from 3 to 19 inclusive, b is an integer of from 0 to 3 inclusive, said heterocyclic group beinginterconnected to the group by a carbon to carbon bond when b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the (C i-1 group through a'carbon to carbon bondand d is an integer of from 3m 7.

4. A linear organosiloxane consisting essentially of units of the formula:

[R-(C-5H2b) =N (-Ca 2a)s i O] wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl, xanthyl, indazyl, pyrimidyl, pyrazyl, cinnolinyl, quinaz olyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-0xazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, iso- 1,2-benzopyranyl, naphthyridinyl, pyrido-(3- 2-b)-pyridinyl, carbazyl, pyridinyl and pyrazolyl groups, R is a member of the group consisting of the hydrogen atom and monovalent'hydrocarbon .radica1s,-R .is a member of .the roup consisting of the hydrogen atom and monovalent hydrocarbon radicals, a is an integer of from 3 to 19 inclusive and b is an integer of from 0 to 3 inclusive, .said heterocyclic group being interconnected tothe :-group by a carbon to :carbon bond when I: is '0 andwhen *b is from 1 "to 3 said heterocyclic group being interconnected to the (C i-I 5) group through a carbon to carbon and wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl,;pyranyl, xanthyl, in'dazyl, pyrimidyl, pyrazyl, cinnolinyl, rquinazolyl, phenazinyl, pyrazolyl, para-dioxin, l 4-osrazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, isooxazolyl, 'l,2-benzopyranyl, :naphthyridin-yl, pyrido-(S- 2 b)-pyridinyl, .carbazyl, pyridinyl and pyrazolyl groups, R 'is a member of the group consisting of .the hydrogen atom and monovalent hydrocarbon 1radicals, R is :a member of the group consisting .of the hydrogen :atom and monovalent hydrocarbon radicals, a :is ,an integer of from 3 to :19 inclusive and b is an integer of from .0 :to 3 inclusive, said heterocyclic group being interconnected to the R1 ...G= group by a carbon to carbon bond when b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the c iti group through a carbon "to carbon bond, 12 is an integer of from 0 to 2, c "is an integer of .from Oto 3.

6. An 'organosiloxane of theforrnula:

I t Ra se-o [m st-01 R-(CbHzb) C=N(O.Hn)s1o xsin;

wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl,

'pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl,

xanthyl, 'indazyl, pyrimid l, 'Pyr azyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, isooxazolyl, 1,2-benzopyranyl, .naphthyridinyl; pyrido-(3- 2-'b)pyridinyl, carbazyl, pyridinyl and pyrazolyl groups, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, a is an integer of from 3 to 19 inclusive and b is an integer of frorn'0 to 3 inclusive, said heterocycliclgroupvbeing interconnected to the Y group by a carbonto carbon bond when b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the (C H group through a carbon to carbon bond, y is an integer and x is an integer of at least 1.

7. Gamma N (S-furylmethylidehe)aminopropyltriethoxysilane.

8. Gamma N-(2-pyridylmethylidenelaminopropyltrh ethoxysilane.

,9. Gamma N-'[3-methylindazyl(methyDmethylidene aminopropylmethyldiethoxysilane.

10. Tetra [delta-N-(7-methyl-3eindolylmethylidene)- aminobutyl].tetramethylcyclotetrasiloxane.

11. An organosiloxane ofithe formulazf CHI wherein R represents a benzofuryl group is an integer and x is an integer of afleast 1.

12. An organosiloxane of the'formula:

.oi at least 0 and x isanintegerofataleast ,1.

13. A process as claimed in claim 16 wherein the temperature is from 5 C. to 250 "C.

14. An organosilicon compound vselected from the class consisting of:

(A) organosilanes of the formula:

, [1PMathew-(can)Y ur] spaasro a is an integer of from 3 to 19 inclusive, b is an integer of from to 3 inclusive, said heterocyclic group being interconnected to the group by a carbon to carbon bond when b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the (C i-1 group through a carbon to carbon bond, and n is an integer of from 0 to 2 inclusive,

(B) organosiloxanes consisting essentially of units of the formula:

(C) organosiloxanes consisting essentially of the units as defined in (B) and units of the formula:

wherein R is as above-defined and c is an integer of from 0 to 3.

15. A process for producing organosilicon compounds selected from the class consisting of:

(A) organosilanes of the formula:

wherein R is a monovalent heterocyclic group selected from the class consistingof pyr'idyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl, Xanthyl, indazyl, pyrimidyl, pyrazyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, iso-oxazolyl, l,2-benzopyranyl, naphthyridinyl, pyrido(3- 2-b)-pyridinyl, carbazyl, pyridinyl and pyrazolyl groups, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is an alkoxy group, a is an integer of from 3 to 19 inclusive, b is an integer of from 0 to 3 inclusive, said heterocyclic group being interconnected to the group by a carbon to carbon bond when b is 0 and when b is from 1 to 3 said heterocyclic group being interconnected to the (C H group through a carbon to carbon bond, and n is an integer of from 0 to 2 inclusive, (B) organosiloxanes consisting essentially of units of the formula:

11 s T wherein R, R R, a, b and n are as above-defined, and

(C) organosiloxanes consisting essentially of the units as defined in (B) and units of the formula:

wherein R is as above-defined and c is an integer of from O to 3, which comprises forming a mixture of an organosilicon compound containing an aminoalkylsilyl grouping, said organosilicon compound being selected from the class consisting of:

(D) aminoalkylsilanes of the formula:

wherein R R a and n are as above-defined,

(E) aminoalkylsiloxanes consisting essentially of units of the formula:

I H bL-O .H:,St0 :22

wherein R a and n are as above-defined and (F) aminoalkylsiloxanes consisting essentially of units as defined in (E) and units of the formula:

wherein R and c are as above-defined; and a carbonyl compound of the formula:

wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl, xanthyl, indazyl, pyridmidyl, pyrazyl, cinnolonyl, quinaz olyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxaziny1, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, isooxazolyl, 1,2-benzopyranyl, naphthyridinyl, pyrido(3-2- b)-pyridinyl, carbazyl, pyridinyl and pyrazolyl groups, R is a member of the group consisting of hydrogen and monovalent hydrocarbon radicals, R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals, R is an alkoxy group, a is an integer of from 3 to 19 inclusive, b is an integer of from 0 to 3 inclusive, said heterocyclic group being interconnected to the groupby a carbon to carbon bond when b is 0 and when 13 wherein R, R R a, b and n are as above-defined and (C) organosiloxanes consisting essentially of the units as defined in (B) and units of the formula:

wherein R is as above-defined and c is an integer of from to 3; which comprises forming a mixture of an organosilicon compound containing an aminoalkylsilyl grouping, said organosilicon compound being selected from the class consisting of:

(D) aminoalkylsilanes of the formula:

wherein R R a and n are as above-defined and (E) aminoalkylsiloxanes consisting essentially of units of the formula:

wherein R a and n are as above-defined and (F) aminoalkylsiloxanes consisting essentially of units as defined in (E) and units of the formula:

wherein R and c are as above-defined; and a carbonyl compound of the formula:

0 R-(CQEInJ-ii-R wherein R and b are as above-defined and R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals and maintaining said mixture at a temperature at which said carbonyl compound and said organosilicon compound containing an aminoalkylsilyl grouping react to produce said organosilicon compound containing a N-(heterocyclic substituted alkylidene) aminoalkylsilyl grouping.

17. A process for producing organosilicon compounds selected from the class consisting of:

(A) organosilanes of the formula:

wherein R is a monovalent heterocyclic group selected from the class consisting of pyridyl, indolyl, acridinyl, pyrryl, piperidinyl, quinolinyl, furyl, benzofuryl, pyranyl, xanthyl, indazyl, pyrimidyl, pyrazyl, cinnolinyl, quinazolyl, phenazinyl, pyrazolyl, para-dioxin, 1,4-oxazinyl, benzoxazinyl, benzisoazolyl, benzisoxazolyl, oxazolyl, isooxazolyl, 1,2-benzopyranyl, naphthyridinyl, pyrido(3-2- b)-pyridinyl, carbazyl, pyridinyl and pyrazolyl groups, R is a member of the group consisting of monovalent hydrocarbon radicals, R is a member of the hydrogen atom and the group consisting of hydrogen and monowherein R, R R a, b and n are as above-defined and; (C) organosiloxanes consisting essentially of the units as defined in (B) and units of the formula:

wherein R is as above-defined and c is an integer of from 0 to 3; which comprises forming a mixture of an organosilicon compound containing an amino alkylsilyl grouping, said organosilicon compound being selected from the class consisting of: I

- (D) aminoalkylsilanes of the formula:

HgN-C-Ha-Sl-RL.

, h wherein R R a and n are as above-defined and I (E) aminoalkylsiloxanes consisting essentially of units of the formula:

wherein R a and n are as above-defined and (F) aminoalkylsiloxanes consisting essentially of units as defined in (E) and units of the formula:

wherein R and c are as above-defined; and a carbonyl compound of the formula:

0 R(ObHrs)-ii-R wherein R and b are as above-defined and R is a member of the group consisting of the hydrogen atom and monovalent hydrocarbon radicals and a solvent and maintaining said mixture at a temperature at which said carbonyl compound and said organosilicon compound containing an aminoalkylsilyl grouping react to produce said organosilicon compound containing a N-(heterocyclic substituted alkylidene) aminoalkylsilyl grouping.

No references cited.

UNITED STATES PATENT OFFICE CERTIFICATION OF CORRECTION Patent No. 2 February 20, 1962 Robert. J, Lisanke ltis hereby certified that error appears in the above numbered patent reduiring correction and that the said Letters Patent should read as corrected below.

Column 3, lines 48 to 51, the lower right-hand portion of equation (1) should appear as shown below instead of as in the pa' tent:

I "C N(CaH2 )S1 column 12, line 52, for "cinnolonyl read cinnolinyl column 13, line 60, after "consisting of" insert the hydrogen atom and lines 61 and 62, strike out "hydrogen atom and the".

Signed and sealed this 23rd day of October 1962.

(SEAL) Attest:

ERNEST W. SWIDER DAVID L. LADD Attesting Officer Commissioner of Patents 

2. AN ORGANOSILOXANE CONSISTING ESSENTIALLY OF UNITS OF THE FORMULA: 